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37 results on '"Zheng, Guo"'

2. ChemInform Abstract: One-Step Efficient Synthesis of Pyrazolo[3,4-f]quinoline Derivatives under Microwave Irradiation

Author

Zheng-Guo Han, Wen-Juan Hao, Xu-Dong Cao, Xiao-Hong Zhang, Shan-Shan Wu, and Shu-Jiang Tu

Subjects
chemistry.chemical_compound, chemistry, Simple (abstract algebra), Microwave irradiation, Quinoline, Organic chemistry, One-Step, General Medicine, Combinatorial chemistry
Abstract

An efficient and inexpensive method with simple work-up is used for the preparation of title compounds, e.g. (IV), which may be used for biomedical screening.

Published
2010

3. ChemInform Abstract: Diversity Synthesis of N-Substituted 2-Amino-1,6-naphthyridine Derivatives under Microwave Irradiation

Author

Ge Zhang, Ning Ma, Zheng-Guo Han, Feng Shi, Chun-Bao Miao, and Shu-Jiang Tu

Subjects
chemistry.chemical_classification, Acetic acid, chemistry.chemical_compound, Chemistry, Microwave irradiation, Organic chemistry, Aromatic amine, Amine gas treating, General Medicine, Malononitrile
Abstract

A sequential three-component reaction of 3,5-diarylidenepiperidin-4-one, malononitrile, and amine (such as aromatic amine, cyclopropanamine, and NH(4)OAc) in acetic acid under microwave irradiation has been developed. In this one-pot reaction, a series of new N-substituted 2-amino-1,6-naphthyridine derivatives were synthesized with excellent yields. This method has the advantages of operational simplicity and increased safety for small-scale fast synthesis of N-aryl 2-amino-1,6-naphthyridines for biomedical screening.

Published
2010

7. ChemInform Abstract: Diversity Synthesis of Pyrimido[4,5-b][1,6]naphthyridine and Its Derivatives under Microwave Irradiation

Author

Feng Shi, Ning Ma, Ge Zhang, Bo Jiang, Zheng-Guo Han, and Shu‐Jiang Tu

Subjects
chemistry.chemical_compound, chemistry, Microwave irradiation, General Medicine, Fluorene, Combinatorial chemistry
Abstract

A series of new heterocyclic compounds, involving pyrimido[4,5-b][1,6]-, benzo[b][1,6]-, pyrazolo[3,4-b][1,6]naphthyridine, and aza-benzo[b]fluorene skeletons were successfully synthesized via the reaction of structurally diverse 3,5-dibenzylidenepiperidin-4-one with various enamine-likes (2,6-diaminopyrimidin-4(3H)-one, 3-amino-5,5-dimethylcyclohex-2-enone, 3-methyl-1-phenyl-1H-pyrazol-5-amine and 1H-benzo[d]imidazol-2-amine) in glycol under microwave irradiation. This method has the advantages of short synthetic route, operational simplicity, and increased safety for small-scale fast synthesis for biomedical screening.

Published
2010

13. ChemInform Abstract: A New Mild Base-Catalyzed Mannich Reaction of Hetero-Arylamines in Water: Highly Efficient Stereoselective Synthesis of β-Aminoketones under Microwave Heating

Author

Zheng-Guo Han, Wen-Juan Hao, Shan-Shan Wu, Feng Shi, Xu-Dong Cao, Bo Jiang, Shu Yan, Xiao-Hong Zhang, and Shu-Jiang Tu

Subjects
chemistry.chemical_classification, Green chemistry, Steric effects, Base (chemistry), chemistry, Microwave heating, Stereoselectivity, General Medicine, Combinatorial chemistry, Mannich reaction, Catalysis
Abstract

A new mild base-catalyzed Mannich reaction of aromatic aldehydes with 1,2-diphenylethanone and hetero-arylamines including pyridin-2-amine and pyrimidin-2-amine is described. In this reaction, a series of new β-aminoketones were stereoselectively synthesized in water by controlling the steric hindrance of the substrates under microwave heating. This method has the advantages of a short synthetic route, operational simplicity, increased safety for small-scale high-speed synthesis, and minimal environmental impact.

Published
2009

14. ChemInform Abstract: An Efficient and Chemoselective Synthesis of Benzo[e][1,4]thiazepin-2-(1H,3H,5H)-ones via a Microwave-Assisted Multi-Component Reaction in Water

Author

Zheng-Guo Han, Wen-Juan Hao, Shu-Jiang Tu, Xu-Dong Cao, Shan-Shan Wu, Xiao-Hong Zhang, Shu Yan, and Feng Shi

Subjects
Aqueous medium, Chemistry, Multi-component reaction, General Medicine, Combinatorial chemistry, Microwave assisted
Abstract

A new and efficient strategy for the synthesis of benzo[e][1,4]thiazepin-2(1H,3H,5H)-ones via a microwave-assisted multi-component reaction in aqueous media is described.

Published
2009

15. ChemInform Abstract: A Facile and Expeditious Microwave-Assisted Synthesis of 4-Aryl-2-ferrocenyl-quinoline Derivatives via Multi-Component Reaction

Author

Shu Yan, Xu-Dong Cao, Shan-Shan Wu, Feng Shi, Xiao-Hong Zhang, Wen-Juan Hao, Zheng-Guo Han, and Shu-Jiang Tu

Subjects
chemistry.chemical_classification, chemistry.chemical_compound, Chemistry, Aryl, Dimedone, Yield (chemistry), Quinoline, Multi-component reaction, Organic chemistry, Acetylferrocene, General Medicine, Ammonium acetate, Aldehyde
Abstract

An efficient and rapid route for the synthesis of 4-aryl-2-ferrocenyl-quinoline derivatives through microwave-assisted multi-component reaction of acetylferrocene with aromatic aldehyde and dimedone in the presence of ammonium acetate using DMF as reaction media at 100 °C is described. This novel procedure lends itself well to combinatorial methods, providing the target heteropolymetallic compounds in excellent yield without further purification.

Published
2009

16. ChemInform Abstract: An ab initio Potential Energy Surface and Vibrational Energy Levels of HXeBr

Author

Zheng Guo Huang, En Cui Yang, and Dai Qian Xie

Subjects
Davidson correction, Chemistry, Potential energy surface, Ab initio, Lanczos algorithm, General Medicine, Physics::Chemical Physics, Configuration interaction, Ground state, Molecular physics, Potential energy, Dissociation (chemistry)
Abstract

A three-dimensional global potential energy surface for the electronic ground state of HXeBr molecule is constructed from more than 4200 ab initio points. These points are generated using an internally contracted multi-reference configuration interaction method with the Davidson correction (icMRCI + Q) and large basis sets. The stabilities and dissociation barriers are identified from the potential energy surfaces. The three-body dissociation channel is found to be the dominate dissociation channel for HXeBr. Based on the obtained potentials, low-lying vibrational energy levels of HXeBr calculated using the Lanczos algorithm is found to be in good agreement with the available experimental band origins.

Published
2008

26. ChemInform Abstract: Microwave‐Assisted Multicomponent Reaction for the Synthesis of New and Significative Bisfunctional Compounds Containing Two Furo[3,4‐b]quinoline and Acridinedione Skeletons.

Author

Wang, Xing‐Han, primary, Hao, Wen‐Juan, additional, Tu, Shu‐Jiang, additional, Zhang, Xiao‐Hong, additional, Cao, Xu‐Dong, additional, Yan, Shu, additional, Wu, Shan‐Shan, additional, Han, Zheng‐Guo, additional, and Shi, Feng, additional

Published
2009
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37. ChemInform Abstract: Probing the Self-Assembly Mechanism of Lanthanide-Containing Sandwich-Type Silicotungstates [{Ln(H2O)n}2{Mn4 (B-α-SiW9O34)2 (H2O)2}]6- Using Time-Resolved Mass Spectrometry and X-Ray Crystallography.

Author

Fan, Lin‐Yuan, Lin, Zheng‐Guo, Cao, Jie, and Hu, Chang‐Wen

Subjects
*TUNGSTATES, *RARE earth metals, *MOLECULAR self-assembly, *ELECTROSPRAY ionization mass spectrometry, *POLYOXOMETALATES, *SILICON oxide
Abstract

The structure of a series of lanthanide-containing sandwich-type polyoxometalates is determined by single crystal XRD and electrospray ionization mass spectrometry. [ABSTRACT FROM AUTHOR]

Published
2016
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